Engine performance question.

[Xenon4300]

After focusing on the aesthetics of my blazer, and now that I'm happy with how it looks, I want to focus on its performance. (while I wait to get my Range...)

I am not looking to spend a lot of money but I am wondering if there are any simple mods that can be done to give it a little more power and make it quicker.

Thanks guise!

[Yogi]

You don't say which motor you have so I'm going to assume that it is the 4.3L. The best bang for the buck in performance is a custom tune of the PCM. Check this thread.

Also, you might get more responses to your question if you post in the 4.3L V6 section.

[Xenon4300]

Thanks man I will read more on that... although at first glance it seems to be my best bet. Yep its a 4.3.

[Onimun]

Electric fan conversion is the best bang for the buck mod. Though they can be a little tricky to set up initially. Cold air intakes/ airbox mod is also a good complement along with Exhaust and custom tune ( listed above).

[Back_N_Black]

he shouldnt have to say what motor, ALL 2nd gen blazers have 4.3's

[Onimun]

Quote: Originally Posted by Back_N_Black

he shouldnt have to say what motor, ALL 2nd gen blazers have 4.3's

you shouldn't have to post, its better to have more info the inadequate information.

[Yogi]

Here is another easy mod, good for a few HP.

[02_Black_XBlazer]

Quote: Originally Posted by Yogi

Here is another easy mod, good for a few HP.

No. Improved low-end throttle reponse, most definitely. More horsepower, no. Still a good starting mod either way.

As always, a higher-flowing aftermarket exhaust is always another key first mod to any build-up as well. They don't all flow the same, but most all aftermarket mufflers will flow better than stock. Meander around the sound clip sticky in the exhaust section and find one to you liking.

[Yogi]

Quote: Originally Posted by 97NAS10SS

No. Improved low-end throttle reponse, most definitely. More horsepower, no. Still a good starting mod either way.

As always, a higher-flowing aftermarket exhaust is always another key first mod to any build-up as well. They don't all flow the same, but most all aftermarket mufflers will flow better than stock. Meander around the sound clip sticky in the exhaust section and find one to you liking.

Did you look a Gchemist's second picture? That flap is blocking a lot of throttle opening off! Opening up that throttle area has to be good for 3-5 HP.

[02_Black_XBlazer]

Quote: Originally Posted by Yogi

Did you look a Gchemist's second picture? That flap is blocking a lot of throttle opening off! Opening up that throttle area has to be good for 3-5 HP.

Yes, I did see the pictures. I've done the mod. That's also the same throttle-body that's found on the 5.0 and 5.7 engines. There's more than enough flow there for a mostly stock 4.3.

I understand your line of reasoning, and the butterfly certainly could become a restriction on a forced induction vehicle, or perhaps a 4.3 with a good bit of internal work, but for stock-to-bolt-on motors, there's going to be essentially no gain. It's the same deal as with a CaI kit...You can take in all the air you want, but if there's been no change to the motor's ability to accept it in (ie: ported heads, larger-lift/duration camshaft, aftermarket intake manifold), there's very little the motor can do with the extra air. Very few of us will build a motor that "outflows" the stock throttle body.

In fact I recently swapped out my busted-ass "ported" throttle body for a stocker (I posted the pics of the hack-job ported tb in a thread a while back in this section), b/c I lost throttle response at low rpm from ported over the stock tb.

[Back_N_Black]

Quote: Originally Posted by Onimun

you shouldn't have to post, its better to have more info the inadequate information.

Isnt that what you just did?